* {
    padding: 0;
    margin: 0;
    list-style: none;
    box-sizing: border-box;
}

html,
body {
    position: relative;
    width: 100vw;
    height: 100vh;
}

#canvas {
    width: 800px;
    height: 450px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    backdrop-filter: blur(15px);
}

body {
    background: url(../images/bilibili.jpg);
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
}
